The historical development of powers to award costs, both in equity and by statute, has been reviewed in a number of cases and need not be repeated: see, eg, Latoudis v Casey [1990] HCA 59; (1990) 170 CLR 534; Knight v F P Special Assets Ltd [1992] HCA 28; (1992) 174 CLR 178 and Oshlack v Richmond River Council [1998] HCA 11; (1998) 193 CLR 72. It is sufficient to note in the present case that the power is statutory and discretionary.
Statutory powers to award costs may be found in one of three forms. The first is an unconstrained conferral of power without direction or limitation. Absent the relevant rule, the power conferred by s 69(2) is such a power. As was explained by Gaudron and Gummow JJ in Oshlack, adapting the words of Dixon J in Water Conservation and Irrigation Commission (NSW) v Browning [1947] HCA 21; (1947) 74 CLR 492 at 505, the power is 'unconfined except in so far as "the subject matter and the scope and purpose" of the legislation may enable an appellate court to pronounce the reasons given by the primary judge to be "definitely extraneous to any objects the legislature could have had in view"': [1998] HCA 11; 193 CLR 72 at [22].
As identified in Latoudis v Casey, the primary and generally the only relevant consideration is that the power is conferred 'to compensate the successful party against the expense to which that party has been put by reason of the legal proceedings': Oshlack at [25]; see also Ruddock v Vadarlis [2001] FCA 1865; (2001) 188 ALR 143 at [12] (Black CJ and French J).
The second category of cases covers those which expressly identify the principle that the power to award costs is intended to permit the successful party to be compensated or indemnified for costs incurred in the litigation, by providing that 'the court is to order that the costs follow the event unless it appears to the court that some other order should be made': Uniform Civil Procedure Rules 2005 (NSW), r 42.1.
The third category of cases encompasses those, like Part 16, r 4(2), which provide as a general rule that there shall be no order as to costs, with a discretionary power to depart from that rule in particular circumstances, including where the court considers that it is fair and reasonable.
No doubt there are a range of variations to be found within this basic structure. Thus, within the third category, the Workplace Relations Act 1996 (Cth) contains in s 824 a prohibition on ordering one party to pay another party's costs, unless the first party 'instituted the proceeding vexatiously or without reasonable cause' or 'by an unreasonable act or omission' caused the other party to incur costs in connection with the proceedings. The history of predecessors to that provision may be found in Heidt v Chrysler Australia Ltd (1976) 26 FLR 257 (Northrop J). Another variation may be found in s 85A of the Native Title Act 1993 (Cth).
Provisions closer in terms to Part 16, r 4 may be found, for example, in the Family Law Act 1975 (Cth) s 117, which, as enacted, read: